Spectroscopy Flashcards by Byron Gower

Q

Eq for: frequency(v) , c, wavelength(λ)

A

v = c/λ

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for: wavenumber (ṽ), λ

A

ṽ = 1/λ (λ in cm)

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for energy of 1 photon

A

E = hv

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq of energy per mol of photon

A

E = N_A h v

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what is the electromagnetic spectrum

A

RMIVUXG

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What part of the spectrum is Rotational

A

Microwave

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What part of the spectrum is Vibrational

A

Infared

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What part of the spectrum is Electronic

A

uv-visible light

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for transmitance

A

T = I/I_0

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for absorbance

A

A = log10(I_0/I) = log(T^-1)

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is the relative size of DeltaE for Rotational

A

small

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is the relative size of DeltaE for Vibration

A

medium

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is the relative size of DeltaE for electronic

A

large

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for E_J

A

E_J=BJ(J+1) , J = 0, positive integers

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for B

A

B = h/8pi^2Ic (c in cms^-1)

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Units for B

A

cm^-1

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Eq for I

A

I =mu r^2

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

eq for reduced mass (mu)

A

mu = m1m2/m1+m2

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is the atomic mass?

A

u = 1.661x10-27kg

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Gross selection rule for rotational

Study These Flashcards

A

dipole must change on rotation

Q

Specific selection rule for rotational

Study These Flashcards

A

delta J = +-1

Q

Eq for E_v

Study These Flashcards

A

E_v=(v+1/2)ṽ_vib, v = 0, positive integers

Q

What is deltaE_v always

Study These Flashcards

A

ṽ_vib

Q

what is ṽ_vib

Study These Flashcards

A

vibrational wavenumber

eq for ṽ_vib

ṽ_vib= (1/2pi c)*sqrt(k/mu)

units for force constant k

Nm^-1

eq for non-linear vibrational nodes

nodes = 3N-6

eq for linear vibrational nodes

nodes = 3N-5

Gross selection rule for vibrational

dipole which changes on vibration

vibrational specific selection rule

deltaV = +-1

types of vibration

stretching and bending

what makes a node IR active

if the vibration causes a change in dipole

what are the branches for rot + vib

-1 0 1 p q r

eq for total energy for rot + vib

E_T = E_V + E_J

eq for Beer Lambert law

A= εcl

Gross selection rule for electronic

dipole changes upon electron transiton

eq for A_obs in mixtures

A_obs = A_A + A_B + ....

calculating mixtures absorbance

use A = εcl and solve simultaneously

Elastic scattering/ Rayleigh scattering

no exchange in energy

Inelastic scattering/ Ramen scattering

exchange in energy

molecules energy for stokes

molecules gains E

molecules energy for anti-stokes

molecules lose E

when deltaV = -1, stokes or anti stokes

anti stokes

when deltaV = +1, stokes or anti stokes

stokes

specific selection rules for ramen spectroscopy

deltaV= 0, +-1, deltaJ= +-2

gross selection rules for ramen spectroscopy

change in polarisability upon rot/vib

anisotopic polarisability

different in all directions

isotopic polarisability

same in all directions (spherical)

-2 -1 0 1 2 o p q r s